Thunderclap headache refers to an excruciating headache of abrupt onset, often described by the patients as the “worst headache of his/her life”. Thunderclap headache among children is a rare entity. Contrary to adults, most thunderclap headaches are primary [1]. We present a 10-year-old boy who had recurrent thunderclap headache after endovascular embolization of pial arteriovenous malformation. We discuss the differential diagnosis and management of post-embolization thunderclap headaches.